I'm not sure why there isn't one in place already, it's ridiculous. Don't roll a PVP server if you're just going to instantly give up. Scenario I just experienced:
Queue into WZ. I get there, there are only 5 of us. One guy says "screw Hutt ball" and refuses to leave manually, instead letting it kick him just as the game starts, making it impossible for us to get a useful person quickly.
The other team scores fast, since there are only 4 of us. More people queue into our side, and instantly leave as they see we are down one point.
!!!!
Throughout the game, there were about 7 people in and out of our side. The other team never scored again after we got 6 useful people, so obviously we could've beaten them had people actually stuck around.
I say, if you leave a warzone so many times in the life of your account, you get instant transfered to a PVE server!